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  <title>horizontal layout modes</title>

  <link rel="stylesheet" href="sandbox.css" />
  <style>
  body, html {
    height: 100%;
  }
  #container {
    position: relative;
    height: 70%;
    margin-bottom: 20px;
  }
  .element.alkali          { width: 170px; height: 190px; }
  .element.alkaline-earth  {}
  .element.lanthanoid      { height: 190px; }
  .element.actinoid        { width: 170px; }
  .element.transition      { width: 220px; }

  .stamp {
    background: #DDD;
    border: 2px dotted;
    position: absolute;
  }

  .stamp1 {
    height: 30%;
    width: 80px;
    left: 30px;
    top: 10%;
  }

  .stamp2 {
    height: 200px;
    width: 40px;
    left: 15px;
    top: 100px;
  }

  </style>
</head>
<body>

  <h1>horizontal layout modes</h1>

<div id="options">
  <h2>Filter</h2>
  <div class="option-set" data-isotope-key="filter">
    <button data-isotope-value="*">show all</button>
    <button data-isotope-value=".metal">metal</button>
    <button data-isotope-value=".post-transition">post-transition</button>
  </div>
  <h2>Sort</h2>
  <div class="option-set" data-isotope-key="sortBy">
    <button data-isotope-value="original-order">original-order</button>
    <button data-isotope-value="number">number</button>
    <button data-isotope-value="name">name</button>
    <button data-isotope-value="symbol">symbol</button>
    <button data-isotope-value="weight">weight</button>
    <button data-isotope-value="category">category</button>
  </div>
</div>

<div id="container">
  <div class="stamp stamp1"></div>
  <div class="stamp stamp2"></div>


  <div class="element transition metal   " data-symbol="Hg" data-category="transition">
    <p class="number">80</p>
    <h3 class="symbol">Hg</h3>
    <h2 class="name">Mercury</h2>
    <p class="weight">200.59</p>
  </div>

  <div class="element metalloid   " data-symbol="Te" data-category="metalloid">
    <p class="number">52</p>
    <h3 class="symbol">Te</h3>
    <h2 class="name">Tellurium</h2>
    <p class="weight">127.6</p>
  </div>

  <div class="element post-transition metal   " data-symbol="Bi" data-category="post-transition">
    <p class="number">83</p>
    <h3 class="symbol">Bi</h3>
    <h2 class="name">Bismuth</h2>
    <p class="weight">208.9804</p>
  </div>

  <div class="element transition metal   " data-symbol="Cd" data-category="transition">
    <p class="number">48</p>
    <h3 class="symbol">Cd</h3>
    <h2 class="name">Cadmium</h2>
    <p class="weight">112.411</p>
  </div>

  <div class="element alkaline-earth metal   " data-symbol="Ca" data-category="alkaline-earth">
    <p class="number">20</p>
    <h3 class="symbol">Ca</h3>
    <h2 class="name">Calcium</h2>
    <p class="weight">40.078</p>
  </div>

  <div class="element transition metal   " data-symbol="Re" data-category="transition">
    <p class="number">75</p>
    <h3 class="symbol">Re</h3>
    <h2 class="name">Rhenium</h2>
    <p class="weight">186.207</p>
  </div>

  <div class="element post-transition metal   " data-symbol="Tl" data-category="post-transition">
    <p class="number">81</p>
    <h3 class="symbol">Tl</h3>
    <h2 class="name">Thallium</h2>
    <p class="weight">204.3833</p>
  </div>

  <div class="element metalloid   " data-symbol="Sb" data-category="metalloid">
    <p class="number">51</p>
    <h3 class="symbol">Sb</h3>
    <h2 class="name">Antimony</h2>
    <p class="weight">121.76</p>
  </div>

  <div class="element transition metal   " data-symbol="Co" data-category="transition">
    <p class="number">27</p>
    <h3 class="symbol">Co</h3>
    <h2 class="name">Cobalt</h2>
    <p class="weight">58.933195</p>
  </div>

  <div class="element lanthanoid metal inner-transition   " data-symbol="Lu" data-category="lanthanoid">
    <p class="number">71</p>
    <h3 class="symbol">Lu</h3>
    <h2 class="name">Lutetium</h2>
    <p class="weight">174.9668</p>
  </div>

  <div class="element noble-gas nonmetal   " data-symbol="Ar" data-category="noble-gas">
    <p class="number">18</p>
    <h3 class="symbol">Ar</h3>
    <h2 class="name">Argon</h2>
    <p class="weight">39.948</p>
  </div>

  <div class="element alkali metal   " data-symbol="Rb" data-category="alkali">
    <p class="number">37</p>
    <h3 class="symbol">Rb</h3>
    <h2 class="name">Rubidium</h2>
    <p class="weight">85.4678</p>
  </div>

  <div class="element other nonmetal   " data-symbol="N" data-category="other">
    <p class="number">7</p>
    <h3 class="symbol">N</h3>
    <h2 class="name">Nitrogen</h2>
    <p class="weight">14.0067</p>
  </div>

  <div class="element actinoid metal inner-transition   " data-symbol="Np" data-category="actinoid">
    <p class="number">93</p>
    <h3 class="symbol">Np</h3>
    <h2 class="name">Neptunium</h2>
    <p class="weight">(237)</p>
  </div>

  <div class="element actinoid metal inner-transition   " data-symbol="Ac" data-category="actinoid">
    <p class="number">89</p>
    <h3 class="symbol">Ac</h3>
    <h2 class="name">Actinium</h2>
    <p class="weight">(227)</p>
  </div>
</div>

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docReady( function() {
  var container = document.querySelector('#container');
  var iso = window.iso = new Isotope( container, {
    itemSelector: '.element',
    stamp: '.stamp',
    layoutMode: 'masonryHorizontal',
    transitionDuration: '0.8s',
    masonryHorizontal: {
      rowHeight: 100
    },
    cellsByColumn: {
      columnWidth: 130,
      rowHeight: 140,
    },
    getSortData: {
      number: '.number parseInt',
      symbol: '.symbol',
      name: '.name',
      category: '[data-category]',
      weight: function( itemElem ) {
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